Fluid Samples

By Fluid Testing your lubricants and coolants, we can find out what’s happening inside your engine without disassembly. Think of it as a “blood test” for the engine, transmission, coolant system, and more. We offer a comprehensive fluids analysis as an additional service for our motor home and RV inspections and as part of our ongoing care program for these vehicles.A towable generator can also benefit from fluid analysis. After the inspection, JG Lubricant Services laboratories analyzes and prepares reports on the fluid samples sent to them. The following documents will help you understand the test results.

During the inspection, a motorhome should undergo a full-spectrum fluids analysis. These will set a baseline for future tests. JG Lubricant Services keeps the test history of each vehicle fluid analysis. This lets us compare metrics over the span of your RV or towable’s life to spot better changes or abnormalities that may require attention.

Owners of RVs and towing vehicles should periodically test the oils in their engines, transmissions, differentials, generators, and coolant systems for signs of oxidation, viscosity change, and contamination.

Fluid Sample Pricing with a Motor Home RV Inspection:

1 Sample – $100
2 Samples – $185
3 Samples – $270
4 Samples – $355
5 Samples – $440
6 Samples – $525

RV Fluid Test Findings

Over three years of RV fluid sampling, what was found is shown in the table below. The data include samples from many different manufacturers and MotoHome types (A, B, and C) and clearly demonstrate the effectiveness of sampling RV systems while highlighting the importance of sampling RV fluids.

RV Fluid Testing Data
Fluid Test Findings

ABNORMAL indicates maintenance issues related to diminished oil or coolant properties where a simple oil and filter or coolant change should alleviate the problem.


CRITICAL indicates more immediate problems related to contamination and/or component wear. These issues may require immediate maintenance and/or repair.